Pitman



PITMAN..

Patented Oct. I4, 1919.

um. bm. bm

vE. E. W. SHAFFER.

APPLICATION FILED DEC. 2. |918- im www 50 being illustratedin elevation.

55 'f Fig. 'isasection on the line V5 5 of Fig.-

- To all whom it may concern:

EDMUND EMANUEL WILKIs sHArrnRQF WICHITA, KANSAS.

Y PITMAN.

Specification of Letters Patent.

Vraterit-ea'0016.14, 1919.

Application IBdDeCember 2, 1918. Serial 'No.264,955.

Be it known that I, EDMUND E. W. SrIAF` FER, a citizen of the United States, residing at Wichita, in the county of Sedgwick and State of Kansas, haveinvented a new and useful Pitman, of which the following is a specication.

for mowers and binders, Yor foil` any other machines to which the pitman may be length to adapt it to different purposes. The invention comprises a 'bodyy portion formed of two parts slidable one on the other and provlded with marginal nesting ribsy serving as strengthening means and guides.y

Means are provided foryfastening the twoY parts of the body member in any position.

of longitudinal adjustment. At one end the pitman is provided with aY ball and socket bearing for the wrist pin of an actuating disk and at the other end has a boX connection for the ball usually present on the sickle bar,'the construction permitting great flexi-v bility of connection without lossofjstrength or rigidity where needed.' Suchgconstruction is particularly adapted for use in a mower. In the case of a binder, the ball ang socket construction isemployedat both en s.

The invention will be best understoodfrom a consideration of the following 'detailed description taken in rconnection with the' accompanying drawing forming partof'thisy specilication, with. .the understanding, howf ever, that Vthe invention'is not confined to any strict conformity with the showing of the drawing but may be changed andinodi# ed solong asA such changes andmodica# tionsmark no material vdeparture from'thel salient features of the invention as expressed in the appended claims. Y

VInthe dravvfingz-u Figure 1 is a plan viewofthe Pitman as.'

adapted fora mower.,

'Fig'. 2 1s a longitudinal central section of the pitman shown in Fig. l, some parts he struc- 2, but drawn on larger scale and with` the clamp bolt in elevation.

6-'6 lof Eig.

Y ,y 1 bers 1, 2 respectively, the members 1 and 2 This inventlon has reference to a pitmanl beingrrelatively narrow with respect totheir that the ribs 4`nest inthe ribs 6, thus permittingthe members 1 and V2 to slide on each,

other longitudinallyof the pitman These ribs or beads also materially Vstrengthen Vand stiifen the pitman and-permit the formation of the pitman of sheet metal of comparatively thin gage without sacrifice of strength, the construction thereby materially'lightening the pitman.

` The body membersl'fand 2 of the pitman have the web portions3 [and 'formed withV longitudinal slots 7 and 8 respectively, with their long` edges notched as `shown at 9, thef slots Vbeing so formed as to match in dif.-

ferent positions of longitudinaladjustment of the body members 1 and 2.r Y

In order Vto secure the two bodymembers 1 and 2 together in the adjusted. positions @ahold them against change '0f adiustment! there are provided bolts 10 each Vwith ahead at one end, said head having a 'squared shank 11^and a threaded stem 12. kThe head 1,0 is toolarg'eto passl through a slot 7 or 8 and thesquared shankflly is of' a size'to lodge in matching nowhere, while the Stem 12 is offa size jto extend throughfthe member 2;and receive a washer13 and a wing nut 14; vThe wings ofthe nut 14 may be perforated for the reception of a tie-wire 15 to preventthe nutswhen set up from loosening. o

The member 1 of the pitman is returned upon itself at the'outer end to form apartially'globular shelljl and the' ribs 4 may be continued about this shell to contribute to its strength andrigidity. The return portion ofthe shell has Yan extension 17 along the web 3 and terminates in a tongue, 18 bent at an vangle-to the extension -17l and projecting through afslot 19 in the web 3 to hold the extension 17 from movement longitudinally of the member 1. A bolt 20 passed through the web 3 and extension 17 serves to hold these parts together and prevent the escape of the tongue 18 from traversing relation to the web 3. Closely adjacent to the shell 16 the extension 17 and web 3 are traversedby another bolt 21 serving as a clamp bolt and provided with washers 22 between the head and nut of the bolt and the respective web 3 and extension 17 Housed in the shell 17 is a partially globular block 23 having alined hubs 24 on diametrically opposite sides extending about to the outer edges of the ribs 4. The block 23 is split longitudinally, as shown at 25, the split being angular. The block has a bore 26 extending through the hubs 24 and the angular split 25 permits a contraction and eXpan sion of the bore so'that it may be readily applied to a wrist pin 27 on a disk 28 and adj usted to such a degree of fit as may be found to be advisable. A grease cup 29 appliedV to the shell 16 and extending through the block 23 for lubricating the wrist pin.

The shell or box 16 at the end of the pitman member 1 does not quite reach to the hubs 24 so that a certain amount of play or movementvis permitted between the block or ball 23 and the shell or box setting it. This provides for any twisting of the machine by which the pitman is carried so that the shell or box 16 and block or ball 23 constitutes in eect a ball and socket joint with limited movement but sufficient to accommodate any twisting which may occur. Of course, the bore 261 may be made to accommodate wrist pins 27 of different sizes as may be necessary. In a mower, the ball and socket arrangement made up of the shells 16 and block 23 is provided at one end of the pitman while a different arrangement is provided at the other end, but in a binder the two ends of the pitman may be alike, thatf is,

each end is provided with a ball and socket connection.

In a mower, the pitman is connected at one end to a wrist pin, like the wrist pin 27 but at the other end must connect toa ball 29a shown in dotted lines in Fig. 6, and usually present on the sickle bar indicatedin dottedv lines at 30 in Fig. 6.

The corresponding end of the member 2 of the pitman has side flange extensions 31 of the web 5 and fast to the inner face of each flange 31 is an elongated plate 32 secured-by rivets 33 or otherwise to the flanges 31. Each plate 32 has a cup- 34 formedon the face toward the other plate so that the ball 29EL may be lodged between the two plates 32 inthe cups or cavities 34 therein. Closeto the cup 32 each plate 31 has a recess 35 on the face toward the other plate and extending between the two plates and traversing both is` a bolt 36 having a wing nut 37 at one end and surrounded between the two plates 32 by a spring 38, the ends of which spring enter the recesses 35. One of the. plates 32 is provided with a horn extension 39 designed to receive and support thev sickle bar 30 when raised.

The outer end of the web 2 is provided with a longitudinal entering slot 40 permitting a limited approach of the extreme ends of the member 2 formed by the slot 40. By means of the nut 37 the socket portions 34 of the plates 32 may be made to grasp the ball 29a with the requisite force, while the spring 38 causes the grasping action to be more or less yieldable whereby the pitman may hold and actuate the Isickle bar firmly yet freely.`

What is claimed is 1. A pitman comprising a body portion consisting of two sheet metal members adjustable upon each other lengthwise of the pitman, and with means at the opposite ends of the pitman for connecting it to machinery, the two members having their long sides provided with nesting beads or ribs formed of the same sheet metal as the body of the pitman.

2. A pitman comprising a body portion formed of two elongated sheet metal members having attaching ends and provided with nesting beads or ribs at the sides and with longitudinal slots each having a series of matching notches in their long edges,'and fastening devices traversing the slots and engaging in the notches, whereby to lock the two members in diiferent positions of longitudinal adjustment.

3. A pitman comprising two elongated sheet metal members, each having means at one end for fastening it to machinery and comprising a central web with a longitudinal slot and marginal beads with the beads of 011el member nesting in the beads of the other, andv means traversing the slots to lock the members together in different positions of longitudinal adjustment.

4. A pitman` comprising two elongated sheet metal members slidable one on the other in the direction of the length of the pitman, both members being formed at the long edges into longitudinal ribs or beads with the beads of one member nesting in those of the other, said beads serving as guiding and strengthening means for the pitman members, and connections traversing and joining the pitman members between the beads, whereby the pitman members are held in different positions of longitudinal adjustment.

5. A pitman having a member comprising a strip of sheet metal returned upon itself at one end to form a box and provided with an extension with fastening means traversing the body of the strip and the ree turn portion, said` return portion being shaped into a partially globular shell, and a partially globular block with diametrically opposite hubs and a bore traversing the block and hub, the shell stopping short of the hubs to permit rocking movements of the block in the shell.

6. A pitman having a member comprising a strip of sheet metal having a central Web and side flanges joining the web at one end of the strip, with the web provided with a longitudinal entering slot at said end, a plate fast to each flange with the plates in facing relation and the faces toward each other formed with matching cups or sockets and with recesses adjacent to the cups, a bolt traversing the plates where recessed, and a spring carried by the bolt and engaging at the ends in recesses.

7; A pitman comprising two elongated sheet metal members in overlapping relation and each provided with a longitudinal slot matching the slot inthe other member and the slots having matching notches in the long sides, said pitman members having ribs or beads on the edges with the beads of one member nesting in those of the other and constituting strengthening means and longitudinal guides, fastening devices traversing the slots and engaging in the notches for holding the pitman members in different po sitions of longitudinal adjustment, one pitman member returned upon itself to form a shell and the other pitman member being provided on opposite edges with facing iianges, a partially globular block seated in the shell and provided with diametrically opposite hubs, with the shell stopping short of the hubs and said block having a diametric bore extending through the hubs, opposed plates fast to the inner faces of the flanges on the end of the other pitman member and each having a socket and a recess therein, a bolt extending through the plates at the recesses and through the side flanges of said pitman member, and a spring on the bolt with its ends seated in the recesses, the

second-named pitman member having the ilanged end provided with a longitudinal s ot.

8. A pitman comprising two elongated sheet metal members in overlapping relation and each provided with a longitudinal slot matching the slot in the other member and the slots having matching notches in the long sides, said pitman members having ribs or beads on the edges with the beads of one f member nesting in those of the other and constituting strengthening means and longitudinal guides, fastening devices traversing the slots and engaging in the notches for holding the pitman members in different positions of longitudinal adjustment, one pitman member returned'upon itself to form a shell and the other pitman member being provided on opposite edges with facing flanges, a partially globular block seated in the shell and provided with diametrically opposite hubs, with the shell stopping short of the hubs and said block having a diametric bore extendingthrough the hubs, opposed plates fast to the innerffaces of the flanges on the end of the other pitman mem- EDMUN D EMANUEL 4WILKIS SlAliliER.V

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

` Washington, D. G. 

